We know that in our USB drive is a lot of space, yet we can not save files on it? Let's see if it is not formatted with the FAT32 file system, which in contrast to NTFS does not accept files larger than 4 GB. If so, you may want to change the file system to NTFS. We will suggest how to do it without losing data.

Check the type of file system disk. To do this, right click on its icon in Windows Explorer context menu and select Properties. The interesting information about the file system found on the General tab.

Now open Command Prompt window - in Windows 7, click on Start and type cmd. Right click on cmd.exe and select Run as administrator, and XP, press Windows + R, type cmd and hit enter.